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Ping QiuandClaude Opus 4.6
80801b0fac
Phase 3 delivers five checkpoints: CP1 Engine Tuning: BlockVolConfig tunables, 256-shard DirtyMap, adaptive group commit (low-watermark immediate flush), WAL pressure handling with backpressure and ErrWALFull timeout. CP2 iSCSI Session Refactor: RX/TX goroutine split with respCh (cap 64), txLoop for serialized response writes, StatSN assignment modes. Login phase stays single-goroutine; full-duplex after login. CP3 Store Integration: BlockVolAdapter (iscsi.BlockDevice interface), BlockVolumeStore management, BlockService in volume_server_block.go, CLI flags (--block.listen/dir/iqn.prefix), sw-block-attach.sh helper. CP5 Concurrency Hardening: WAL reuse guard (LSN validation in ReadLBA), opsOutstanding counter with beginOp/endOp + Close drain, appendWithRetry shared by WriteLBA and TrimLBA, flusher LSN guard in FlushOnce. Bug fixes (P3-BUG-2–11): unbounded pending queue cap, Data-Out timeout, flusher error logging, GroupCommitter panic recovery, Close vs concurrent ops guard, target shutdown race, WAL-full retry vs Close, WRITE SAME(16) for XFS, MODE SENSE(10) + VPD 0xB0/0xB2 for Linux kernel compatibility. 797 tests passing (517 engine + 280 iSCSI), go vet clean. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>